I actually thought of something similar like this awhile ago when I was thinking why the chocos only magic was white magic when in games like choco dungeon he can do a wide variety of roles including black magic as well as other magics.

in a way... Chocos being the Paladin/White Mage/Monk
Moogles can be... Warrior/Black Mage/Bard
Gnath can be a Lancer/Machinist

but the doman kids? Hmmm.... They are far from fighting ready so... Maybe... help find items better?
and by items, I mean like the low drop rate from getting stuff like say atma or crystals from fates increase just a little and they can find consumable/crafting items from time to time